Ski



FIG. 1 is a perspective view of a ski showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof shown on an enlarged scale;

FIG. 4 is a side elevational view of the ski shown in FIG. 2; and

FIG. 5 is a bottom plan view thereof.

The cross-hatched areas shown in FIGS. 1 through 3 represent areas of color contrast only. 

The ornamental design for a ski, as shown and described. 